You may get .psd* file of "Golden foil gift box from scratch" Photoshop tutorial by making a payment. Put the tutorial title in "Add special instructions to seller" line of PayPal and it will be sent to you shortly.

Add shade effect using the same way just like in the example with paper corner on the page 7.

Create a cross-section tape and a bow using previous way, but play with layer style adjustments, change direction for gradients.

Create shade effect for bow. Load selection for bow shape, fill it with black color in the bottom new layer, apply small Gaussian Blur effect, and play with Opacity.